Dielectric Properties of High-Silica Sand at 2.45 GHz

• Autorzy: Opyd B , Nowak D. , Granat K.
• Języki publikacji: EN

Abstrakty

EN

In the paper, presented are measurements of permittivity (εr) and dielectric loss factor (tgδ) of high-silica moulding sand, determined at 2.45 GHz by perturbation method on a stand of waveguide resonance cavity. Determined were electrical properties of the main component of moulding sands, i.e. high-silica base, critical for their heating kinetics. The measurements were carried-out for six kinds of high-silica sand with diverse grain size distribution. Analysis of the results indicates that both permittivity and loss tangent values are similar for all kinds of high-silica moulding sand. Irrespective of their grain size analysis, neither of the examined sandmixes shows susceptibility to action of 2.45 GHz microwave field. The presented results make a ground for developing a mathematical model of microwave heating of technological systems composed of moulding sand and foundry tooling.

Słowa kluczowe

EN

innovative foundry technologies; microwaves; moulding sand; high-silica sand

PL

innowacyjne technologie odlewnicze; mikrofale; masa formierska; piasek kwarcowy

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2015
• Tom: Vol. 15, iss. 1 spec.
• Strony: 136--139
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Opyd B

• Wroclaw University of Technology, Department of Foundry Engineering, Plastics and Automation, Smoluchowskiego 25, 50-372 Wrocław, Poland

autor

Nowak D.

• Wroclaw University of Technology, Department of Foundry Engineering, Plastics and Automation, Smoluchowskiego 25, 50-372 Wrocław, Poland

autor

Granat K.

• Wroclaw University of Technology, Department of Foundry Engineering, Plastics and Automation, Smoluchowskiego 25, 50-372 Wrocław, Poland

Bibliografia

• [1] Stachowicz, M. Granat, K. & Nowak, D. (2011). Application of microwaves for innovative hardening of environment-friendly water-glass moulding sands used in manufacture of cast-steel castings. Archives of Civil and Mechanical Engineering. 11 (1), 209-219. DOI: 10.1016/S1644-9665(12)60184-8.
• [2] Grabowska, B. & Holtzer, M. (2007). Application of microwave radiation for crosslinking of sodium polyacrylate/silica gel system used as a binder in foundry sands. Polimery. 52(11/12), 841-847. ISSN: (0032-2725). (in Polish).
• [3] Huafang, W. Wenbang, G. & L. Jijun. (2014). Improve the humidity resistance of sodium silicate sands by ester-microwave composite hardening. Metalurgija. 53 (4), 455-458. ISSN 0543-5846.
• [4] Ashby, M. Shercliff, D. & Cebon H. (2011). Materials Engineering, vol. 2. Publishing House Galaktyka Sp. z o.o., Łódź. (in Polish).
• [5] Mujumdar, S.A. (Ed.) (1995). Handbook of Industrial Drying . New York: Marcel Decker.
• [6] Kowalski, S. J. Rajewska, K. Rybicki, A. (2005). Physical basics of microwave drying. Poznań: Editorial Office of Poznan University of Technology (in Polish).
• [7] Lewandowski, L. (1997). Materials for casting moulds. Kraków: Akapit. (in Polish).
• [8] Granat, K. Opyd, B. Stachowicz, M. Nowak, D. & Jaworski, G. (2013). Usefulness of foundry tooling materials in microwave heating process. Archives of Metallurgy and Materials. 58 (3), 919-922. DOI: 10.2478/amm-2013-0101.
• [9] Sheen, J. (2007). Amendment of cavity perturbation technique for loss tangent measurement at microwave frequencies, Journal of Applied Physics, 102.